The Pentagon is moving too slowly in its pursuit of a space-based sensor system for missile defense, the head of U.S. Strategic Command argued today, as the Missile Defense Agency's latest budget forecasts plans to spend billions more on ground-based radars instead. MDA has a concept to develop a space-based sensor layer for tracking ballistic missiles in the midcourse phase of flight, but "we're struggling to get started with it," Gen. John Hyten, head of STRATCOM, said today during a...